Well-reaming implement.



A. P. BUCK & M. C. BENEDICT.

WELLEEAMI'NG IMPLEMENT.

APPLICATION FILED JAN. 4, 1912.

LGifififiQ, Patented Nov. 26, 1912.

2 SHEBTSSHEET 1.

25 65 72 any d' A. P. BUCK 613M. C. BENEDICT WELL REAMING IMPLEMENT.

APPLIOATION FILED JAN. 4, 1912.

1,045,6m. Patented Nov.f26, 1912 2 S HEBTSSHEET 2.

TTFJD gTATES T @FFTQJE.

ARTHUR P. neon AND MYRON c. nnnnmc'r, or are messes, 'eaiiiroiiitiii.

WELL-REAMING msnnm nitr.

Application flied T 0 all whom it may comm 2.1 7

Be it known that we, ARTHUR P. BUCK and MYRON C. BENEDICT, citizens of the United States, both residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Well-Beaming Implements, of which the following is a specification.

This invention relates to in well. reaming implements, and it proposes a reamer which is adapted to Work below the well casing, and during an upward movement, in order to enlarge the diameter of the well below the casing without the necessity of withdrawing the casing, or of being ultimately forced to employ a line of casing of less diameter, as is frequently the case where a well has to be sunk to a greater depth than originally contemplated, and where it is not practical, for various reasons, to pull up the original line of casing.

The improved well reamingimplement includes a casing equipped with jaws which may be operated to stand out from said casing, or to be substantially flush therewith, and means within the casing for looking the jaws in either of the positions aforesaid. The implement is controlled automatically, and its use in connection with well drilling machinery requires but a single line of cable. V 7

An embodiment of the invention is shown in the accompanying drawings, wherein:

Figure 1 is a central vertical sectional view showing the jaws locked, or positively maintained in operative position; Fig. 2 is a similar view showing a different relation of the parts and with the jaws in inoperative position; Fig. 3 is a horizontal sectional view on the line 33 of Fig. 1, in the direction of the arrow; Fig. 41 is a similar view on the line it-4- of Fig. 1; Fig. 5 is a top plan view of the implement; Fig. 6 is a horiimprovements zontal sectional view on the line 66 of Fig. l, in the direction of the arrow; Fig. 7 is a detail view showing a locking finger or detent, to be hereinafter referred to; and Fig. 8 is a detail view showing the pin or shaft upon which the locking fingers or detents, comprehended in the construct-ion, may be mounted.

Similar characters of reference designate corresponding parts throughout the several icnt.

Patented Nov.

I ing 1, which. preferably has an oval cross l [A I 1 'provided on their upper faces w section and is closed at inner end, "as by a plug 2, and at its upper end by aplug 3. The plugs and 3 are preferably threaded into the ends of the casing 1, and the plug 3 terminates in a threaded attachment cone 4:, by means ofwhich the implement is connected in the line of tools. The casing 1 is provided in its lower portion with diametrically opposite vertical -s1ots, .which accommodate the cutting jaws 5. The latter fit snugly in the slots and are pivoted on transverse pins 6 which are suitably fitted and journaled in the opposite walls of the slots through which the jaws 5 work. To

control the position of the jaws 5, an axially movable rod 7 is provided. The rod 7 is disposed concentrically in the casing, and its lower portion passes through an opening in the plug 2 and carries at its eX- t-remity a plate or disk 8 which has a conical seating and is held in position bya lock nut 9, or some equivalent device. The rod 7 is formed with upper and lower cone shaped enlargements 10 and 11, suitably distant from one another, and having an opposite taper, the upper enlargement 10 tapering downwardly, and the lower enlargement 11 tapering upwardly. At asuitable distance above the upper enlargement 10 the rod 7 is provided with a reduced portion 12 which defines an overhanging shoulder 13 that is preferably under-cut. The upper portion of the rod 7 passes through an opening in a guide plate 14, which is-secured by transverse pins 15, the lati er being suitably fixed in the casing 1.

The shoulder 13, with engaging fingers or detents l6 and 17, the finger 16 being arranged at some distance below the finger 17 and at the opposite side of the casing, and its lower end being keyed or otherwise fast on a transverse pin 18, which is journaled in the casing? The lower portion of the finger 17 is similarly keyed or otherwise fast on a transverse pin 19, which is also journaled in the casing. The fingers l6 and 17 terminate at their upper ends in forks 20 which are preferably ith semicircular ribs 21, adapted to engage the under-cut shoulder 13. The upper portion of the finger 16 is connected to a retractile coil spring 22, and the upper. portion of the finger 17 is connected to an expansive coil Adjacent the pivot pins 18 and above referred to, coacts 19, and also adjacent the upper portions of the fingerslG and 17, the casing is preferably provided with openings which are normally closed by threaded plugs 24:. The plug adjacent the spring 23 serves as a bearing for the latter, while the plug adjacent the spring 22 coacts with an. opposing shoulder concentric to the opening in which said plug is fitted to'retain a washer 25, to which the adjacent end of the spring 22 is secured. One end of the pin 18 is squared as at 26, (Fig. 8) and it is preferable, though not necessary, to form the pin 19in like manner. i I

By the use of this implement, it is unnec efssary, if the depth of the hole'or well is to be increased, to make such portion of in: creased depth of less diameter. Instead, the well is drilled for the required distance beyond the casing to a diameter which corre-' 'sponds to the inside diameter of the casing,

,and the extended well opening thus formed is reamed. out by the implement described.

Before the implement clears the derrick floor, the rod 7 is raised sufficiently to move the conical enlargement 10 from between the jaws 5, and to enable the jaws to assume a position in'which they are flush with the casing, as in Fig. 2. Thereafter, the finger 16 is turnedinwardly against the tension of its spring 22, a wrench engaged with the squared end 26 of the pin 18 being used for this purpose. The rib 21 on the finger 16 is thus brought in line with the shoulder 13, so

that when the rod 7 is released, said finger will engage said shoulderand support said rod in a positionwherein its conical extension 10 will not interfere with the inward movement of the upper portion of the jaws 5. The casing 1 is then allowed to. descend in'the well opening, and the'projecting lower end of the rod 7 ultimately strikes the bot-' tom of said opening. Ther'eupon, asthe descending movement ofthe casing continues, the rod 7 will be relatively released, and at such time, the spring 22 will withdraw the finger 16 from engagement with the shoulder 13, so that when the motion of the casing isreversed, the rod 7 may drop relatively to the casing, thereby bringing its conical enlargement 10 between the jaws 5, and moving the upper and cutting portion of said jaws outwardly beyond the casing. The rod 7 is supported in its lowermost position with respect to the casing, not only by the engagement of its conical enlargement 10 with the jaws 5, but also by the engagement of the face of its conical enlargement 11 with the lower end of the casing or the plug 2. The upward movement oi the casing is then continued, and the reaming operation is effected by the jaws 5, which, it may be noted, during such upward movement are positively locked or maintained in operative position.

ing, and the reaming operation, have been completed, the casing is again allowed to descend in the'well opening, and the lower end of the rod 7 again ultimately engages the bottom of said opening. At such time,

.however, the downward movement of the casing is continued until the conical enlargement 11 comes between the jaws and the finger 17 is forced by the spring 23 into engagement with the shoulder 13. l/Vhen the conical enlargement 11 enters between the jaws 5, it moves said jaws from the position of Fig. 1 to the position of Fig. 2, in

which they have a substantially vertical diwell, and the well casing driven to the required distance.

. The inner faces of the jaws 5 are preferably transv'ersely'concave, so as to fit eonformably' against the faces of the conical enlargements 10 and 11, and to thus be more eiiiciently engaged by said enlargements. The jaws 5 are preferably provided at their upper ends with extended heels 27, which, in the operative position of said jaws, engage against the inner .face of the casing and serve to prevent an entrance of dirt or moisture into the. casing at points immediately above the cutting edges of said jaws.

If desired, the casing may be provided with an inclosed perforated diaphragm 28, having an opening through which the rod 7 works, and suitably supported, as by transverse pins 29. 4

Having fully described our invention, we claim:

1. A well reaming implement comprising a casing equipped with jaws which may be operated to stand out from the casing or to be flush therewith, and means for automaticaliy operating said jaws, including an axially movable rod disposed disconnectedly within the casing and having an extended portion which projects through the lower end of the casing, and jaw engaging en largements within the casing.

2. A well reaming implement comprising a casing equipped with jaws which maybe operated to stand. out from the casing or to be flush therewith, an axially movable rod disposed disconnectedly within the casing and having an extended portion which projects through the lower end of the casing, and jaw engaging and moving parts operated by the rod in its downward or upward movement with relation to the casing.

3. A well reaming implement comprising a casing equipped with. jaws which may be operated to stand out from the casing or to set a be fiushtherewith, an axially movable rod disposed disconnectedly within the casing and having an extended portion which projects through the lower end of the casing, jaw engaging and moving parts operable respectively on the upward movement of the rod relatively to the cas ng-to move the jaws inwardly and on the downward movement of able rod j with the opposite relative the rod relatively to the casing to move the aws outwardly, and movable fingers supporting the rod at either of two positions in the casing.

i. A well reaming implement comprising a casing equipped with pivoted jaws which maybe operated to stand out from the casing or to be flush therewith, an axially movdisposed disconnectedly within. the casing and having an extended portion which projects through the lower end of the casing, the rod being provided within the casing with upper and lower conical enlargen'ients which taper toward one another and severally engage and operate said jaws in consequence of the respective downward and upward movements of the rod relatively to the casing, and movable fingers for supporting the rod at either of the two positions in the casing wherein one or the other of the conical enlargements is engaged with said jaws.

A well reaming implement comprising companion elements, one of which is adapted to be connected in the line of tools and the other of which is freely movable within certain limits with relation to the first named element, jaws carried by one of the elements and adapted to be projected or retracted, and jaw engaging and moving parts operated by the other element in accordance with the opposite relative movements of the elements, one of the elements having an extended portion which projects substantially below the other element.

6. A well reaming implement comprising companion elements, one of which s adapted to be connected in the line of tools and the other of which is freely movable within certain limits with relation to the first named element, jaws carried by one of the elements and adapted to be projected or re tracted, jaw engaging and moving s operated. by the other element in accor dance movements of the elements, one of the elements having an extended portion which projects substantially below the other element," and movable finers for supporting the companion elements in either of two relative positions in which the jaws are held retracted or are free to move as the case may be.

7. A well reaming implement comprising as'companion elements a casing and a rod @Kially disposed therein, one of the companion elements being I adapted to be connected in line of tools and the other companion. element being freely movable with 'in certain h. relation to the first named element, ried by one of the elements and -l 1 t4: riltx l retracted, and jaw Qlifj lhiflg who parts operated by the other element in am cordance with the opposite relative movemen'ts of the elements, one of the elements having an extended portion which pro ects substantially below the other element,

8. A well reaming implementcomprising as companion elements a casing and "a rod axially disposed therein, one of the companion elements being adapted to be connected in the line of tools and the other companion element being freely movable within certain limits with relation to the first named element, jaws carried by one of the elements and adapted to be projected or retracted, jaw engaging and moving parts operated by the other element in accordance with the opposite relative movements of the elements, one of the elements having an extended po tion which projects substan? tially below the other element, and movable fingers for supporting the companion elements in either of two relative positions in which the jaws are held retracted or are free to move as the case may be.

A well reaming implement comprising as companion elements a KklSing and a rod axially disposed therein, one of the companion elements being adapted to be connected in the line of tools and the other companion element being freely movable within certain limits with relation to the first named element, jaws carried by one of the elements and adapted to be projected or retracted, upper and lower cord-form parts provided on the other element and severally operable to engage and respectively actuate the jaws, one of the companion elements having an extended portion which projects substantially below the other element, and movable fingers for supporting the companion elements in either of two relative positions in which the jaws are held retracted or are free to move as the case may be.

-10.. A well reaming implement comprising tworelatively movable companion elements, one of which is provided with jaws adapted to be projected or retracted and the other of which is instrumental, consequent to the particular relative movement of the elements, to eflcct the projection or retraction of said jaws, the relative movements of the elements being affected as to one of the elements, in one direction by gravity, and in the other direction by the engagement of the opening.

ing two relatively movable companion ele- 11. A well reaming implementcompristoo implement with the bottom of the well ments, one 0t which is provided with jaws lea adapted to be projected or retracted and the other of which is instrumental, consequent to the particular relative movement of'the elements, to effect the project-ion or retraction of said jaws, the relative movements of the elements being affected as to one of the elements, in one direction by gravity, and in the other direction by the engagement of the implement with the bottom of the well opening, and means for fixing the companion elements at either of two relative positions in which the jaws are held retracted or are freeto move as the case may be.

12. A well reaming implementcomprising two relatively movable companion elements, one of which is provided with jaws adapted to be projected or retracted and the other of which is instrumental, consequent to the particular relative movement of the elements, to effect the projection or retraction of said jaws, the relative movements of the elements being affected as to eaner 0 gravity, and in the other direction by the engagement' of the implement with the bottom of the well opening, and movable fin gel-s for supporting the companion elements in either oftwo relative positions in which the jaws are held retracted or are free to move as the case may be.

13. A well'reaming implement comprising a casing having vertical slots, jaws movable in said slots and adapted to be projected or retracted, a means for projecting or retracting the jaws, thejaws being provided at their upper ends with heels adapt-- ed to engage against the inner faces of the casing in the projected positions of said "aws. .r J ARTHUR. P. BUCK.

MYRON C. BENEDICT. Witnesses:

G. N. PETTEYS, T. H. OSTROM. 

